J P Bel

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Nowadays, techniques for education are based on the combination of theoretical formulas, experimental measurement and simulation approaches. Theoretical analysis, experimental and simulation approaches based educations allow developing simple and non expensive tools for the aim of studying complex problems in optical network communication. Theoretical(More)
After reviewing COLLETTI'S research, the authors describe their own experimental work on multifrequency impedance testing in relation to stapedial fixation in otospongiosis, and other factors. Their findings, based on 266 tested ears, lead the authors to the conclusion that : (1) the most useful frequencies, from the clinical point of view, are the low ones(More)
In the first part of this paper we report on a new method we have developed for the study of the genesis and regulations of the behavior of infants in interactive situations. Detailed information is given on the following aspects: 1. The technical characteristics of the device that allows the infants to be seated in an upright position; 2. The different(More)
Correlation between tinnitus and audiometric loss, modification of tinnitus by medical or surgical treatment, allow to suspect the origin of tinnitus due to otospongiosis and to give the patient a practically always confirmed prognosis. Audiometric localization of tinnitus is essential, as it is the best clue to etiology, treatment and prognosis of(More)
The footplate fenestra should be performed in its posterior third part to avoid pressure of the piston on the membranous labyrinth, situated very close to the footplate in 2% of the cases in otosclerotic patients. Gain in bone conduction differs according to the size of the fenestra performed. Low frequencies improve most when the whole posterior third part(More)
The authors propose a test consisting in performing injections of Renovaine, a very strong anaesthetic drug, in the external ear duct in order to reduce momentarily severe and decompensated tinnitus. They discuss the usefulness of this test and develop two concepts to explain its action. They make a pragmatic approach of the tinnitus etiopathogeny.
Impedancemetry gives important information in otospongiosis, both for relative compliance and impedance audiometry. The detection of the stapedius reflex is facilitated by recruitment in some audiometric types of otospongiosis and enables us to solve many of the masking problems which are particularly difficult in this disease due to the very important(More)
Results of impedancemetry have been compared with operative findings in 1 867 cases of otosclerosis, 1 583 of which were pure otosclerosis. This comparison indicated that: (1) with present techniques, the results of impedancemetry are only of a relative value in otosclerosis; it is thus necessary to asses the various connected anatomical elements in the(More)
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